Drainage geocomposites

Drainage geocomposites (a) geonet and (b) cuspated. Inset magnified portion of the geocomposite. 

For example, the ingress of a rising water table can be restricted by a cross-slope drainage geocomposite with a GCL layer or geomembrane placed above to act as a capillary break in the water flow. A second drainage geocomposite above the impermeable layer would then remove surface... 

The approach of multilayering of coarse and fine fibres has also been applied for enhanced drainage functionality. One development is a three-layer non-woven geotextile which is claimed to give a better performance than drainage geocomposites with a geonet core. The three-layer non-woven... 

Fischer, G. R., Holtz, R. D. and Christopher, B. R. (1996), Characteristics of Geotextile Pore Structure , Recent Developments in GeotextUe Filters and Prefabricated Drainage Geocomposites, Bhatia, S. K. and Suits, L. D., Editors, ASTM Special Technical Publication 1281. Proceedings of a Symposium Field in Denver, Colorado, USA, June 1995, pp. 3-18. 

Zhao, A and Montanelli, F. (1999), Effect of soil presence on flow capacity of drainage geocomposites under high normal loads Geosynthetics 99, Conference Proceedings, Vol. 2, pp. 783-798. 

Drainage or fluid transmission Allowing water (or vapour) to be transmitted in the plane of a thick nonwoven needle-punched geotextile or a drainage geocomposite. 

A parameter for in-plane permeability of a geotextile or drainage geocomposite. 

Denver, CO—Shohia Bhatia and L. David Suits, organizers and STP editors, Geotextile Filters and Prefabricated Drainage Geocomposites (STP 1281, 15 papers)... 

Figure 8.11 Transmissivity versus compressive stress for drainage geocomposite (Cazzufli...

Figure 13.21 Illustration of the application of a basal reinforcement—drainage geocomposite.

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